Home / 28,774.78-39,715.32-19,337.87

Finding the Fourth Proportional to 28,774.78, 39,715.32 and 19,337.87

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Solution

The fourth proportional to 28,774.78, 39,715.32 and 19,337.87 is: 26,690.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,774.78 : 39,715.32 = 19,337.87 : x
  2. Step 2: Convert to fraction form
    28,774.78/39,715.32 = 19,337.87/x
  3. Step 3: Cross multiply
    28,774.78x = 39,715.32 × 19,337.87
  4. Step 4: Simplify right side
    28,774.78x = 768,009,598.48
  5. Step 5: Solve for x
    x = 768,009,598.48/28,774.78
  6. Step 6: Final answer
    x = 26,690.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.